Scroll offset pinning and content size notifications were only used for the Mac overlay navigation …

content/renderer/render_frame_impl.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_RENDER_FRAME_IMPL_H_
 #define CONTENT_RENDERER_RENDER_FRAME_IMPL_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 336 matching lines @@
                                      const blink::WebURL& target);
   virtual void didAbortLoading(blink::WebLocalFrame* frame);
   virtual void didCreateScriptContext(blink::WebLocalFrame* frame,
                                       v8::Handle<v8::Context> context,
                                       int extension_group,
                                       int world_id);
   virtual void willReleaseScriptContext(blink::WebLocalFrame* frame,
                                         v8::Handle<v8::Context> context,
                                         int world_id);
   virtual void didFirstVisuallyNonEmptyLayout(blink::WebLocalFrame* frame);
-  virtual void didChangeContentsSize(blink::WebLocalFrame* frame,
-                                     const blink::WebSize& size);
   virtual void didChangeScrollOffset(blink::WebLocalFrame* frame);
   virtual void willInsertBody(blink::WebLocalFrame* frame);
   virtual void reportFindInPageMatchCount(int request_id,
                                           int count,
                                           bool final_update);
   virtual void reportFindInPageSelection(int request_id,
                                          int active_match_ordinal,
                                          const blink::WebRect& sel);
   virtual void requestStorageQuota(blink::WebLocalFrame* frame,
                                    blink::WebStorageQuotaType type,
@@ skipping 253 matching lines @@
   GeolocationDispatcher* geolocation_dispatcher_;
 
   base::WeakPtrFactory<RenderFrameImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_FRAME_IMPL_H_